修改User模块，同步原始代码

Modules/Store.Users/Services/UserPassword.cs

@@ -0,0 +1,22 @@
+using Microsoft.AspNetCore.Identity;
+using Store.Users.Entities;
+namespace Store.Users.Services;
+
+/// <summary>新密码使用带盐哈希；兼容旧 wxxd.user 的明文密码，登录验证不修改密码。</summary>
+public static class UserPassword
+{
+    private static readonly PasswordHasher<UserEntity> Hasher = new();
+    public static string Hash(UserEntity user, string password) => Hasher.HashPassword(user, password);
+    public static bool Verify(UserEntity user, string password)
+    {
+        if (string.IsNullOrEmpty(user.Password) || string.IsNullOrEmpty(password)) return false;
+        // Identity 的密码以固定的版本字节开头，格式损坏时拒绝验证。
+        if (user.Password.StartsWith("AQAAAA", StringComparison.Ordinal) || user.Password.StartsWith("AA", StringComparison.Ordinal))
+        {
+            try { return Hasher.VerifyHashedPassword(user, user.Password, password) != PasswordVerificationResult.Failed; }
+            catch (FormatException) { return false; }
+        }
+        return System.Security.Cryptography.CryptographicOperations.FixedTimeEquals(
+            System.Text.Encoding.UTF8.GetBytes(user.Password), System.Text.Encoding.UTF8.GetBytes(password));
+    }
+}